大气科学2012，Vol.36Issue(1)：145-169,25.
云凝结核浓度对WRF模式模拟飑线降水的影响:不同云微物理参数化方案的对比研究
Effects of Cloud Condensation Nuclei Concentration on Precipitation in Convection Permitting Simulations of a Squall Line Using WRF Model:Sensitivity to Cloud Microphysical Schemes
摘要
Abstract
Effects of cloud condensation nuclei (CCN) concentration on explicit-deep convection simulations of precipitation associated with a squall line that developed in Guangdong Province, China are investigated using the Weather Research and Forecasting model. Four groups of simulations are conducted, each with a different bulk mi-crophysical scheme (Morrison, Thompson09, Thompson07, and WDM6) and consisting of three members with low, median, and high CCN concentration, respectively. Changes caused by the CCN concentration variation in the surface rainfall rates within the regions of deep convection, stratiform cloud, and shallow convection, as well as in their areas, are compared among the four groups of simulations. Then the microphysical processes and strength of dynamical circulation in the simulations are examined. It is found that; (1) The CCN- precipitation impacts among the four groups of simulations exhibit both similarities and differences, due to the direct or indirect relationships between the microphysical processes and CCN concentration, the complicated linkage among various microphysical processes, and the nonlinear coupling between microphysical and dynamical processes. (2) The simulated CCN- precipitation impacts are the most significant with the Thompson09 or Thompson07 scheme and the least notable with the WDM6 scheme. (3) In these experiments, precipitation is delayed and weakened during the early stage of the simulations and rainfall amount is also decreased during the late stage, while the CCN - precipitation impacts are more complicated during the mature stage of the simulated squall line.关键词
云凝结核-降水影响/WRF模式/云微物理参数化方案/飑线Key words
cloud condensation nuclei- precipitation impact/WRF model/cloud microphysical scheme/squall line分类
天文与地球科学引用本文复制引用
董昊,徐海明,罗亚丽..云凝结核浓度对WRF模式模拟飑线降水的影响:不同云微物理参数化方案的对比研究[J].大气科学,2012,36(1):145-169,25.基金项目
国家自然科学基金资助项目40875064、40921003,公益性行业(气象)科研专项GYHY200806020,中国气象科学研究院基本科研业务费专项基金2007R001 （气象）
